Home > Manufacturers > Now_Foods > L-Phenylalanine, 60 caps / 500mg L-Phenylalanine, 60 caps / 500mg L-Phenylalanine, 60 caps / 500mg NF-473 Your Price: $4.99 Regular: $7.99 You Save: $3.00 Quantity: Description: L-Phenylalanine is an essential, nine-carbon amino acid and is a precursor to the amino acid tyrosine. Because tyrosine is necessary for the synthesis of proteins and the production of the neurotransmitters dopamine and norepinephrine, phenylalanine is an extremely important nutrient that must be obtained through the diet or supplementation. The Inside Scoop: Free of: sugar, salt, starch, yeast, wheat, gluten, corn, soy, egg, milk or preservatives. Ingredient Details: Gelatin (capsule). L-Phenylalanine 500 mg Suggested Use: As a dietary supplement, take 1 capsule 1 to 3 times a day as needed, preferably between meals. Serving Size: 1 Capsule Servings Per Container: 60 Warnings: Persons with high blood pressure should consult a physician before using.